lance armstrong now admits he used performance-enhancing drugs. in an interview with oprah, armstrong finally answers the claims that have dogged his career in cycling. but will coming clean. mark a fresh start? and what's the cost to his tarnished reputation? we take a closer look. >> for more than a decade lance armstrong looked into the cameras and denied doping. but in a two and a half hour interview with oprah.the disgraced cyclist now reportedly admits to using performance-enhancing drugs. >> i would say he did not come clean in the manner that i expected. it was surprising to me. i would say that for myself, my team, all of us in the room, we were mesmerized and riveted by some of his answers. >> reporter: oprah talked about her exclusive sit down with armstrong on morning tv. >> i would say there were a couple of times when he was emotional. >> reporter: no longer trying to out-pedal doping allegations, armstrong is in a race to save his public image. he's been stripped of his seven tour de france titles and is banned from competing in cyc